Okay, I just finished putting together my computer, I plug it in, turn it on and the LEDS flick on and the fans spin, for about .5 seconds, then dead. I checked the cables hundreds of times. Everything is hooked up and as far as I know, hooked up right. It's not a too little problem as the case and psu used to belong to a friend who had more things hooked up to it, and its only a few months old. I can't think of anything that could be wrong except the power supply though, what do you guys think?

check that your cpu is seated correctly, and that the fan on the heatsink is plugged in correctly, if your didn't get your cpu in there right you probably screwed that up along with the mobo, but if it's turning off and then back on, it could very well be that your chip is overheating...

well.. or if the cpu is dead or something, it's possible.. I'm really not quite sure what the problem is here, but maybe check your ram also.. damn! this lightning is freaking me out lol.. anyways make sure your heatsink is on really well..

ack, storm just cut the power out hehe.. anyways, there's not a wrong way to put it in, but it won't go in if it's backwards.. the slit in the stick should line up with the slit in the dimm slot, but it's possible it didn't seat correctly, like.. go all the way in, may want to check that out